You don't. You've got 50 lemmings and need 23 for 3 stars. You need the climber to changed direction at the top then it should be reasonably clear what you can do.
I'm on level 10 and I can not work out how to get 3 stars, so when you get there let us know if you workout how to get 3 stars or if anyone else does any hints are appreciated!
« Last edited by Grand Cheesemaster on May 6th 2018 »